Pneumatic drill.



- S. A. TITUS.

ENEUMATIG DRILL. Y APPLIGATON FILED DEG.31,1908.

Patented A191126, 1910.

1;... b@ ll Si a@ m ,f/ Agr H .H i R\.

citizen of the United States residing iat'- work.

rangement of the ai no part of my .sure actuated telescope joint for feeding the drill-up to its work.

I"tails of erin, and ing. 2 is cyliiidcer which normally lies adjacent to the 35 I vention w iich Ihave UNITED srafrns PATENT orales. I SAMUEL .aITUs, or; GANANEQMEXIC. I t

955,924. Patented Apr. 26,1910.

Application led December 31, 1908. Serial No. 470,235. To allwliom it I the end of the pipe 21 forms a stop to pre- B6 vent complete withdrawal of the shaft 2O from lthe pipe 21. It will be observed that thepipe 20 and shaft2l are united by the telescope joint. The remote end ofthe shaft 2O is'adapted tn engage an abutment, und then the drill will be fed to its work by extensionuof the described telescope joint.

At its end the cylinder 15 terminates in va wide thick flange 25 having av shallow annular groove 3l cut in its face. Lying Vhe country of Ie'xico, have invented certain new and useful Improvements in Pneumatic Drills, of'which the following is a specilication.

The principal object of my invention is-to provide a, new and improved drill of the type intended to be actuated bythe pressure of an elastic fluid.

lA further object of my invention is to proadjacent to this fiange 25 is the disk 26 hav.- videa drlll in which the pressure o an Ping a slightly. projectingshou1der27 'fitting elastic fluid, such as air, is used both-for the with the said annular groove"4 31. On' its purpose of reciprocating the drill hammer and 'also for feeding the drill -up against vits an outwardly 'directedllange 28, whichV lies against'athe said Vshoulder 2 7. The slidable sleeve"29 surrounds Vthe p'ipe 21 and 'ends in an outwardly directed flange 30, matchin the flange 25. This iianofe 30 has an annu ar groove 32 ofsullicient e ith to accommodate the pipe flange 28 andV the adjacent shoulder 27. he bo ts 33 and the corresponding nuts 34 21` is turned -in object of my invention is to pres- Still another provide a-.stoping drill having a Huid y Invention resides tion and claims,

accompanying drawings, in Whiehdisk 26 tightly between 'the two o posed Figure l' is a longitudinal section of the flanges 25 and/30, and at thel same tiineI t0 slee-ve a-perspective view of the ofv a preure feed pipe which forms a Fig. 3 is a perspective 'normally lies adjacent `e feed pipe shown end otA ih'e .piston clamp the pi eflange 28 between the 29 and the disk 26. A hole 35 is drilled radially into the disk to the center thereof, Where it is met by the axial hole 3S, the two together formin a 'duet which leads from the periphery o? thcdislrto the side face thereof, 'eonnectinowith the pipe 21. On the periphery of he disk this duct cnds in a screw threaded socket 37, in which is litted the pipe 38. A compressed air supply lrolled by the valve 40, beyond which point,

end .part of the in Fi'r 2.- Fig. A4r is the disk shown in Fig.'.3.

Inthe articular embodiment of my inchosen to illustrate in the accompanyingdrawings, the drill compipe-39 is conserve to clampthe' opposite face thisdisk 26 has a siniilarshoulder 427. The'ladjaceiit end of the longpipe prises a c linder l'havmg a single actiiw piston an hammer' 16 therein. At4 the en at 46, the ipe branches, one branch conof the cylinder 15 is an 'inside bushing 17 trolled by. t ie valve l1 leading lo the duct 3355+236 'and -the-other brauch controlled by the valve 42 leading through 'the pipe 43 to the pistou cylinder 15.

short length dially into the peliphe A this is to serve as ahan lefor manipulatinfr the drill.

a'lhe drill shank having been introduced in the hole 18 in the bushing 17 and the rethrongh the l1ole'18nfwhich the shank o the drill is adapted to be introduced,' so as to receive hammer blows from the pistou hammer 16; The air exhaustoullet is indi cated by the reference nnn'lcral 19. he ai'- r passages by which reciprocation of the piston 16 is eliected forms :resent invention, and inns` much las it, is oldand well known in the art I dol not en ter upoira description of it here. -At-the opposite end of the structure isl a rod 20 having ahead 23 with packing 24 on the end thereof. This packing 24 makes a ti ht lit with the inside of the pipe 21, wit iin which is the head 23.. An inside ring 22 at against 'an a' 'p ropriatc abutment the valves 40-41 may e opened. This will permit any' to pass through the ipe'39 and duct 35- 36 into the ipe 21 'w ere between t e face ofthe disk 26 and the hea its pressure' acting e f pipe 44 is screwed rae of the disk'26;

les

mote end of the shaft 20 hai-'ing beeniplaced I lio .23 will push these members` apart, thus feediti ing the drill up against its work. .The piston hammer may be set in operation by openin the valve 42, which wil admit air from lt iefeedl ipe 39 through the branch 43 to thevcylin er l5, thus reciprocating the piston' 16 1n the usual manner. If at any time it is'desircd to stop the hammer with out releasing the pressure feed thereof, this may be 'accomplished by closing the valve 42. If, on the other hand, 1t is desired torelease. the pressure feed without stopping lthe reciprocation of the hammer, tlns may be ,ac-

corplished by closing the valve 41.'

e structure of the disk 2G `and its associated elements constitute an important feature of 'my' invention. It 'will be seen that the only screw threads employed in this joint about the disk 2G 33 and nuts 34, which of course can be v erv readily replaced if they become damaged. The bolts 33 are all at a considerable distance from the axis of the drill, and there'- fore they give a strong rni joint bracing the structure firmly against side thrusts at intermediate points. Whenever it is desired to dismount the drill in order to obtain access to-thc cylinder 15 or the pipe 21 or both of these chambers, this can readily be accomilished by removing the nuts 3ft and withraiving the bolts Thereupon-the sleeve 29 may he slipped back upon the pipe 21 as access may be".

indicated in Fig. 2 and ready had Ato'all-the parts. 'Intlns ivay'the'drill may be opened -up so as to remove the piston 16 1li thatis desired. i"

It will be'seen that I have invented animproved p'ncninatic'drill in whichtlie parts Y are assembled 1n a simple and dnialilej1uaii-- 40.

ner,":nd insfuch a 'yvay'that' the drill can be conveniently takenapart and put together by an unskllled vperson whenever desired.

Moreoven'my improved drill aii'ords convenient independent controllintgl means for ghe piston driving cylinder and the pressure eed.

1. In a pneumatic drill, a cylinder having a' reeiprocatory piston therein,y ii"llziiige on .onejendof said cylinder, adisk across the end of the cylinder adjacent to said tlaiige, a pressure feed pipe having'a flange at its end adjacent tdth'e'otherjSde of the disk, a

sleeve- 'surroundine' said' pipe, a flange onsaid sleeve adapted to overhe the flange 'on are those on the bolts j the pipe, and means to clamp the said parts together.

'2Q In a pneumatic drill, a cylinder having a reciprocatory piston therein` a flange on the end of said cylinder, a disk adjacent to said flange, a pressure feed pipe having,r a smalllange at its end adjacent to thc other side of the disk, a sleeve on said pipe having a largellang'e on one end thereof, said large tlange'liaving' an annular groove in which the said sxnall llange tits, and nieans to clanip the said parts together.

3. In a pneumatic drill, a cylinder having a reciprocatory piston therein, a flange on the end of said cylinder, a disk adjacent to said flange, a pressure feed pipe havinpr a small flangeat its endadjacent to the other side of the disk, a shoulder on vthe face ot the disk adjacent to said sinall flange .-iiid ot the sanie sizi-,ia sleeve surrounding, said pipe, a large flange on one end of said sleeve, said larges flange having an annular groove adapted lo receive the said sinall flange and shoulder, and means to clanip the said parts together.

4. In a pneumatic drill, a cylinder having a reciprocatory piston therein, a disk across the end of the cylinder, a pressure feed pipe having allang@ at. its end adjacent the other side of the disk, a ring around said pipe he; yond the flange thereon, and means to clainp the VringP tothe disk. i

5. a pneumatic drill, a cylinder having a reciprocatory piston therein, a flange on one end'of said cylinder, a disk across the end iif'saidylinder adjacent said flange, a pressure" feed 'pipe on theother side ol' thi` dislgii'dflange associated Iwith the end ot' said pressure feed p'ipefand longitudinal bolts Vthrough thesaid thinges andthe edge nl' the disk l ying bietivee'n the flanges.

6.' ln a piieinnatie drill,"a' cylinder having a reciproeatory piston therein7 the end of the cylinder, a pressuril feed pi pe having a flange at its end adjacent the other side of the disk, a ring around said pipe' lieyoi'id the flange thereon, and bolts through the ring,lthe alge ofthe diskanil thi- [lange on theeiid ol' the pressure l'eed pipo.

ln lestiiiiniijl whereof, lhave subscribed llf'itnesses c BLMNE Bowman J'As. R. Con'ijuinnis.

a disk across 

